Move default excluded assembly definition

csharp/ql/src/Stubs/AllStubsFromReference.ql

@@ -10,11 +10,6 @@ class AllExternalPublicDeclarations extends GeneratedDeclaration {
   AllExternalPublicDeclarations() { this.fromLibrary() }
 }
 
-/** All framework assemblies. */
-class NonTargetAssembly extends ExcludedAssembly {
-  NonTargetAssembly() { this.getFile().getAbsolutePath().matches("%Microsoft.NETCore.App.Ref%") }
-}
-
 from Assembly a
 select a.getFullName(), a.getName(), a.getVersion().toString(), a.getFile().getAbsolutePath(),
   generatedCode(a)

csharp/ql/src/Stubs/AllStubsFromSource.ql

@@ -10,4 +10,13 @@ class AllDeclarations extends GeneratedDeclaration {
   AllDeclarations() { not this.fromLibrary() }
 }
 
+/** Exclude types from these standard assemblies. */
+private class DefaultLibs extends ExcludedAssembly {
+  DefaultLibs() {
+    this.getName() = "System.Private.CoreLib" or
+    this.getName() = "mscorlib" or
+    this.getName() = "System.Runtime"
+  }
+}
+
 select concat(generatedCode(_) + "\n\n")

csharp/ql/src/Stubs/MinimalStubsFromSource.ql

@@ -29,4 +29,13 @@ class UsedInSource extends GeneratedDeclaration {
   }
 }
 
+/** Exclude types from these standard assemblies. */
+private class DefaultLibs extends ExcludedAssembly {
+  DefaultLibs() {
+    this.getName() = "System.Private.CoreLib" or
+    this.getName() = "mscorlib" or
+    this.getName() = "System.Runtime"
+  }
+}
+
 select concat(generatedCode(_) + "\n\n")

csharp/ql/src/Stubs/Stubs.qll

@@ -345,15 +345,6 @@ private class GeneratedNamespace extends Namespace, GeneratedElement {
  */
 abstract class ExcludedAssembly extends Assembly { }
 
-/** Exclude types from these standard assemblies. */
-private class DefaultLibs extends ExcludedAssembly {
-  DefaultLibs() {
-    this.getName() = "System.Private.CoreLib" or
-    this.getName() = "mscorlib" or
-    this.getName() = "System.Runtime"
-  }
-}
-
 private Virtualizable getAccessibilityDeclaringVirtualizable(Virtualizable v) {
   if not v.isOverride()
   then result = v